Answer:
One
Step-by-step explanation:
It is given that,
y = 3x-5 ....(1)
y = -x+4 .....(2)
We can solve the above equations using substitution method. Put the value of y from equation (1) to equation (2) such that,

Put the value of x in equation (1) we get :

It means that the value of x is  and the value of y is
 and the value of y is  . Hence, the given equations has only one solution.
. Hence, the given equations has only one solution. 
 
        
             
        
        
        
The type of transformation that has happened is a translation. Translation is when the image's size nor shape changes after transformation. every point in the image moves the same distance in the same direction.
the equation for the translation mentioned is;
T4, -5(x,y)
this means that every point in the image has moved down by 5 units and moved to the right by 4 units.
Point A to Point E
Point A - (-4,-1)
after translation (x+4, y-5) = (-4+4,-1-5)
                                          = (0,-6) these are the coordinates of point E.
the other three points too have moved the same distance and direction as point  A did.
 
        
        
        
D>0<10 should be the answer 
 
        
             
        
        
        
Answer:
Part 9) The number of items on Emily's grocery list is 5 and the number of items on Bobby's grocery list is 13
Part 10) The height of the taller bookshelf is 4 feet and the height of the shorter bookshelf is 1 foot
Step-by-step explanation:
Part 9)
Let
x ----> number of items on Emily's grocery list
x ----> number of items on Bobby's grocery list
we know that
 ----> equation A
 ----> equation A
 ----> equation B
 ----> equation B
Solve by substitution
Substitute equation A in equation B

solve for x



Find the value of y

therefore
The number of items on Emily's grocery list is 5 and the number of items on Bobby's grocery list is 13
Part 10) 
Let
x ----> the height of the taller bookshelf in feet
y ----> the height of the shorter bookshelf in feet
we have
 ----> equation A
 ----> equation A
Remember that

To convert inches to feet divide by 12
so

 ----> equation B
 ----> equation B
Solve the system by substitution
substitute equation A in equation B
 
 
solve for y
 
 
 
 
 
 
Find the value of x

therefore
The height of the taller bookshelf is 4 feet and the height of the shorter bookshelf is 1 foot
 
        
             
        
        
        
Answer:
Tristan will need 8 to go around the perimeter 
Step-by-step explanation:
because 8×8 is 64 so he will have enough